Which of the following phenomena result from the bending of light through ice crystals?
A. sundogs and sun pillars
B. halos and sundogs
C. rainbows and halos
D. halos and the green flash
Answer: B
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Most mutations
A. proceed though a set of programmed sequences. B. enable individuals to evolve by becoming genetically different. C. occur from exposure to external agents such as radioactivity. D. cannot be passed along through reproduction cells. E. result from random changes that occur in coded genetic instructions.
According to our text, urban growth in peripheral countries is a consequence of migration to cities, stimulated largely by the onset of
A) war. B) drought and famine. C) the demographic transition. D) pollution and disease. E) structural adjustment programs.
Which of these actions can we take to reduce desertification?
A. increase irrigation B. increase grazing C. manipulate weather to control drought D. decrease number of trees in desertified areas E. decrease human contribution to climate change
What is the most important factor controlling the seasonal distribution of precipitation in the Aw (Tropical Wet and Dry) realm?
A) proximity to maritime tropical air masses B) the location of mountain ranges C) migration of the ITCZ D) the location of ocean currents E) movement of cyclonic storms